The second dry ice explosion in as many days at a Los Angeles airport remains unexplained.

A bomb squad arrived at Los Angeles international airport (LAX) late on Monday to investigate the latest blast, but there were no reports of any injuries or evacuations, the authorities said.

The incident was reported shortly before 8.30pm at the airport's Tom Bradley international terminal, but no details as to where the dry ice was found or whether there was any significant damage have been revealed.

Two other devices found at the airport did not explode, local police said. No flights were affected.

Investigators do not believe the incident is linked to terrorism.

On Sunday night, a plastic bottle containing dry ice exploded in an employee bathroom in LAX's terminal 2, causing flight delays of up to four hours after airport police halted security screening for more than an hour.

No arrests were made in either case.

The Los Angeles police department's criminal conspiracy division is assisting in the investigation.